Rotary intaglio-printing machine



Nwv. L 392?.

Q. WENKLER ROTARY INTAGLIO PRINTING MACHINE Filed Feb. 5, 1927 ATTORNEY Patented Nov. 1, 1927.

UNITED srAras CARI; WINKLI E R, F BERN, SWITZERLAND.

BQTABQY INTAGLIO-PRINTING MACHINE.

Application filed February 5, 1927,, Serial No. 166,224, and in Germany April 8, 1925.

In rotary machines for intaglio printing devices are used for adjusting the rubber cylinder, as a whole, and also, each end separately. These devices, however, stand away from the machine frame and only offer sufficient resistance to the rubber cylinder when they are very strongly constructed. Further they have the drawback that the adjustment of the impression cylinder only takes place at to one end, so that the regulation of the pressure of the impression cylinder on the plate cylinder is rendered diflicult. Devices for putting the cylinders of rotary machines in and out of their operating positions are known, in which the ends of the cylinder shafts are journaled in two eccentric bushes which are both adjustable.

From such existing devices my present invention differs by the fact that the eccentric 0 bushes, in which both ends of the shaft of the impression cylinder of a rotary intaglio printing machine are journaled, are mechanically connected together in such a waythat both ends of the cylinder shaft can be moved 5 simultaneously, whilst a second eccentric bush of each bearing can be adjusted alone. By the eccentric bearing in holes or bores of the machine frame all yielding of the impression cylinder is prevented. Further, the

) arrangement of the independently adjustable eccentrics enables convenient adjustment of the impression cylinder during the printing operation, thus without it being necessary to put the cylinders in and out of the printing 5 position.

In the drawing, illustrating my invention by way of example, Fig. 1 shows a section through the bearing of an impression or rubber cylinder, Fig. 2 is a front elevation of I one of the bearings, and Fig. 3 a back elevation of the same hearing.

The bush 1 can be turned in a bore of the frame 2 and has an eccentric bore in which a bush 3, having an eccentrically arranged ball i bearing 4, can turn. For the purpose of turning the bush 1, a worm 6 is provided which engages in a toothed segment 7 of the bush 1. This adjustment produces a lateral movement of one end of the cylinder shaft independent of the other, so that the pressure of this cylinder on the plate cylinder can be adjusted so as to be evenly distributed overthe entire width of printing.

In order to put the impression cylinder in and out of the printing position, that is, to move said cylinder towards and away from the plate cylinder, the bush 3 is turned. For the purpose of assuring that this action takes place simultaneously at both ends, a hand wheel 8 is adapted to turn a spur-wheel 9 which engages in a toothed segment 10. This segment turns on a shaft 11 journaled in the frame 2 and is connected with the bush 3 by a link 12. The shaft 11 extends over to the other side of the machine and carries, on that side, a lever 13, which, by means of a link 12, turns the bush 3 of the corresponding bearing through the same angle as the bush 3 of the other bearing. By turnin the hand-wheel 8 the bush 3 at each end 0 the cylinder. is turned, so that the impression cylinder is put in and out of operation as a whole.

What I claim and desire to secure by Letters Patent of the United States is:

1. In a rotary intaglio printing machine, eccentric bushings in which the ends of the cylinder are mounted, a shaft, a lever carried by one end of the shaft, a link connecting the lever with one of the bushings, a toothed segment mounted on the other end of the shaft, a link connecting the segment with the other bushing, and a manually operated pinion meshing with said segment.

2. In a rotary intaglio printing machine a frame having oppositely arranged bores, two eccentric bushings, one inside the other, in each bore, a cylinder having its ends mounted in the inner bushings, a shaft, a lever on one end .of the shaft, a link connecting the lever, with the inner bushing of one of the bores, a toothed segment on the other end of the shaft, a link connecting the segment with the inner bushing of the other bore, a manually operated pinion meshing with the segment, and means for independently turning the outer bushing.

In testimony whereof I have signed my name to this specification.

CARL WINKLER. 

